The tastings, which were done for the magazine's March issue, were led by a professional tester and included staffers from Consumer Reports' food-testing division, spokeswoman Heather Joy Thompson said. The group tasted medium cups of coffee -- no cream or sugar -- at two locations from each company in November.

They rated McDonald's premium brand the best, calling it "decent and moderately strong," although lacking "subtle top notes," according to the AP.

The others didn't fare so well. Dunkin Donuts' coffee was deemed "inoffensive, but it had no oomph." Starbucks was labeled "strong, but burnt and bitter." Burger King's offering resembled coffee, "but tasted more like hot water," the magazine said.

Consumer Reports said McDonald's was the least expensive, at $1.40 per cup on average. Dunkin' Donuts was the priciest, at $1.65.

In response, Starbucks spokeswoman Sanja Gould said taste is subjective and pointed to the Seattle-based company's sales. "The 44 million customer visits to our stores per week globally indicate that many people enjoy our premium coffee," she said in a statement.